Identificaciones de vichernandez

Not quite sure what this is, but I dissected it from inside of a native centipede (Nadabius pullus) that was collected in May 2005. Documented parasites of lithobiomorph centipedes include Tachinids (Loewia) and Proctotrupids (Phaneroserphus), but I'm not sure if either of those are what I've got here. The parasite is about 5 mm long and 1.5 mm wide and was taking up the whole body cavity between segments 8-12. Parts of its body were sticking out of the spiracles of the centipede before dissection. Any help in narrowing this thing down would be appreciated! I'm assuming an arthropod based on what typically infests lithobiomorphs, but even that could be wrong.